User`s guide

Chapter 2:Software and Hardware Installation
xxiv - PShop User’s Guide
Configuring the Environment
Environment Variables
A number of environment variables affect the operation of PShop (and the
applications that may use PShop). These are normally either unnecessary or set
automatically during installation, but you may want to change their default
values if you are customizing your system. If you would like to check on their
settings, you can inspect the wrapper script(s) in $VV_HOME/bin. An
explanation of each environment variable follows:
VV_HOME is the location where PShop is installed. By default,
/opt/Vividata on Solaris 2.x, and /usr/vividata on all other systems. It is
set by default when the program is executed and need only be changed if
there is some specific reason for doing so.
VVP_FILTER provides a way for PShop to read file formats through a
filter the user provides, thus extending the built-in set of file formats that
are recognized. If a file fails to read through a built-in file reader, then
the input is passed through the designated external filter to be converted
to a recognized format. The value set should be the path to an external
filter and any command-line options it requires. The filter must take stdin
and output the results via stdout. The default filter is the mpage utility,
which converts ASCII text to PostScript. Refer to any available
references or help files for information regarding the usage of mpage and
other common filters.
VVPRE_FILTER is similar to the VVP_FILTER, but different in that
it is applied before any of the usual file format readers (or VVP_FILTER
for that matter) are applied. Any designated filter needs to either process
or pass-through any data intended to be read by PShop. The value set
should be the path to an external filter and any command-line options it
requires. The filter must take stdin and output the results via stdout. The
default setting is “none”.
Setting the Environment Variables
You can set the appropriate environment variable(s) in your .cshrc or .profile file.
When the next C or Bourne shell is started, its environment will be automatically
configured for Vividata's environment variables.